*/
    private double calculateAvailability() {
        long total = totalRequests.get();
        if (total == 0) {
            return 100.0;
        }
        long accepted = total - totalCircuitOpenRejections.get();
        return (accepted * 100.0) / total;
    }

    /**
     * Circuit breaker metrics snapshot (Java 17 Record)
     */

            "The network name cannot be found.",
            "No more connections can be made to this remote computer at this time because there are already as many connections as the computer can accept.",
            "Indicates a Windows NT Server could not be contacted or that objects within the domain are protected such that necessary information could not be retrieved.",

        ComponentUtil.getLdapManager()
                .validateGroupAttributes(Long.class, attributes,
                        s -> throwError.accept(messages -> messages.addErrorsPropertyTypeLong("attributes." + s, "attributes." + s)));
    }

    // ===================================================================================

            verify(mockAddress, times(1)).toInetAddress();
        }

        @Test
        void shouldReturnNullWhenWrappedIsNeitherInetAddressNorAddress() throws Exception {
            // UniAddress only accepts InetAddress, NbtAddress (which implements Address), or Address
            // Testing with NbtAddress which doesn't return anything from toInetAddress
            NbtAddress nbtAddress = mock(NbtAddress.class);

        /*
         * 2010 - We no longer try a Node Status to get the
         * hostname because apparently some servers do not respond
         * anymore. I think everyone post Windows 98 will accept
         * an IP address as the tconHostName which is the principal
         * use of this method.
         */
        if (this.hostName.isUnknown()) {
            return getHostAddress();
        }

    }

    @Test
    @DisplayName("Should handle null configuration gracefully")
    void testNullConfiguration() {
        // When - constructor accepts null config without throwing
        Smb2TreeDisconnectResponse responseWithNull = new Smb2TreeDisconnectResponse(null);

        // Then - response is created successfully
        assertNotNull(responseWithNull);
    }

        // Null treeConnection throws NPE when acquire() is called
        assertThrows(NullPointerException.class, () -> new SmbTreeHandleImpl(resourceLoc, null));
    }

    @Test
    @DisplayName("Null resourceLoc is accepted but may cause issues later")
    void constructorNullResourceLoc() {
        // Null resourceLoc doesn't throw NPE immediately - it's stored and may cause issues when used
        // This test documents the current behavior

 * <p>
 * <strong>SECURITY NOTE:</strong> When accepting file paths from untrusted sources,
 * always validate them using {@link #isPathSafe(Path, Path)} to prevent path traversal attacks.
 * Methods that accept path strings do not perform automatic validation to maintain backward compatibility.
 * </p>
 *
 * @author higa
 */
public abstract class FileUtil {

    /**
     * Do not instantiate.
     */

            if (fnf != null && !fnf.accept(this, name)) {
                continue;
            }
            if (name.length() > 0) {
                // if !files we don't need to create SmbFiles here
                final SmbFile f = new SmbFile(this, name, e.getType(), ATTR_READONLY | ATTR_DIRECTORY, 0L, 0L, 0L);
                if (ff != null && !ff.accept(f)) {
                    continue;
                }

        // Arrange
        jcifs.SID mockSid = mock(jcifs.SID.class);
        when(mockSid.unwrap(sid_t.class)).thenReturn(mockSidT);
        testSids = new jcifs.SID[] { mockSid };

        // Act & Assert - Constructor accepts null, no exception thrown
        assertDoesNotThrow(() -> {
            new MsrpcLookupSids(null, testSids);
        });
    }

    @Test
    void constructor_shouldThrowExceptionWithNullSids() {